Fountain-pen.



. PATENTBD MAR. 2l, 1905.

C. W. BOMAN.

FOUNTAIN PEN.

APPLIGATION FILED Dmzl, 1904.

' UNITED STATES Patented March 21, 1905.

PATENT OEEICE.

CLAES WILIAM BOMAN, OF NEW YORK, Y., ASSIGNOR TO EAGLE PENCIL COMPANY,OF NEW YORK, N. Y.

FOUNTAIN-PEN.

SPECIFICATION formingpart of Letters Patent No. 785,654, dated March 21,1905.

Application filed December 21,1904. Serial No. 237,780.

To 1/ZZ whom, it may concern:

Be it known that I, CLAES VILIAM BoMAN, a citizen of the UnitedStates,and a resident of New York city, in the county and State of New York,have invented a new and useful Improvement in Fountain-Pens, of whichthel following is a specification.

My invention relates to what are styled self-filling fountain-pens, andmore particularly to that kind of such pens in which a laterally-movablepresser located within the handle and interposed between the handle andthe collapsible ink-bag contained therein is combined with a movableoperating cap mounted on the exterior of the handle and connectionsbetween said'cap and presser whereby the movement of the cap in onedirection or the other, as the case may be, shall cause the presser tomove laterally in a direction to squeeze the walls of the ink-bagtogether. My present application is directed to a form of pen of thisgeneral kind in which the operlating-cap has a rotary movement.

The nature of my improvement and the manner in which the same is or maybe carried into eiect will be understood by reference to theaccompanying drawings, in Which- Figure l is a longitudinal elevation,partly in section, of a fountain-pen embodying my improvement, the'parts being in the position they occupy when the ink bag isuncompressed. Fig. 2 is a like view oi' the pen with the parts in theposition they occupy when the ink-bag is compressed. Fig. 3 is aperspective View of the presser, the operating-cap and connections, andplug in which the same are mounted detached from the pen.

- A is the usual tubular handle of hard rubber or other suitablematerial, having at its open front end the tubular nozzle B,constituting the pen-tip and containing the feed-bar C and the pen D.Tithin thehandle is a collapsible ink-bag E, made, preferably,ofvulcanized soft rubber, having its open front end tted on the rear endvof nozzle B. Ink from the bag passes through the nozzle to the feedbarand thence to the pen. Thus far there is nothing new in the device.

The rear end of the handle is closed by a plug F, secured tightlythereto by a frictionjoint or otherwise. In the plug is formed an axialbore through which passes the stem or plunger G, which is capable ofrotary movement in the plug and is surmounted by the external operatinghead or cap H. The inner end of the rotary stem or plunger is formed asa crank g, upon the end of which crank is swiveled at g2 aconnecting-link la, the other end of which is loosely jointed to thepresser I, in this instance by a T- head which passes through andloosely engages a slot 71:2 in the presser.

Within the handle and secured therein so as to be capable of lateralmovement is the presser I, consisting in this instance of a single longslim linger, preferably of spring metal, which is interposed between theinkbag E and the handle A and extends lengthwise of the same. Thepresser has a head a', having a flange i', which enters and looselyengages a cross-slot j in the plug, and a shank 2, which is received ina recess j' in the exterior of the plug.

It is preferred to provide means for locking the operating cap or head Hagainst accidental rotary movement, although such means are notindispensable. One simple and eective arrangement for the purpose isillustrated in the drawings. The stemG is capable'of slight lengthwisemovement in the plug and on its inner end is armed with a spiral springs, which tends to draw it in a direction to hold its head H down uponthe plug F. On the outer portion of the stem, just under the cap, is alaterally-projecting pin Z, which when the parts arev in,normalposition, as in Fig. 1, enters a groove Z2 in the outer face of theplug, thus locking the head to the plug against rotary movement. Bypulling out the stem slightly the pin will be disengaged from the grooveand the operating-cap will be free to rotate. Y f

The operating-cap in Fig. 2 is represented as having been rotated aboutone hundred and eighty degrees from the position shown in Fig. l. InFig. l the crank g is turned toward the presser and the ink-bag isuncompressed. The rotation oi' the cap to the position shown in Fig. 2has turned the crank away from the presser, with the effect of drawingthe presser laterally in a direction to compress the ink-bag. When thecap is turned back to normal, the ink-bag will be released and free toexpand.

Having described my improvement and the best way now known to me ofcarrying the same into practical effect, I state in conclusion that I donot limit myself narrowlyr to the structural details hereinbefore setforth in illustration of the invention; but

What I claim herein as new, and desire to secure by Letters Patent, isas follows:

1. In a fountain-pen, the combination with the tubular handle and thecollapsible ink-bag therein, of a laterally-movable presser interposedbetween the collapsible reservoir and the handle@ rotatableoperating-cap mounted on the exterior of the handle and connectionsbetween the presser and the rotatable operating-cap whereby the rotationof the cap shall cause the lateral movement of the presser in adirection to squeeze the walls of the inkbag together or toward eachother, substantially as hereinbefore set forth.

2. In a fountain-pen, the combination with the tubular handle and thecollapsible ink-bag therein, of a laterally-movable presser interposedbetween the handle and the ink-bag, a rotatable operating-cap mounted onthe eXterior of the handle, connections between the presser and the. capwhereby the rotating movement of the cap shall effect the lateralmovement of the presser, and means for automatically locking the cap innormal position, substantially as and for the purposes hereinbefore setforth.

In testimony whereof I afix my signature in presence of two witnesses.

CLAES WILIAM BOMAN.

WVitncsses:

SAMUEL KRAUs, OSCAR ANDERSON.

